Heidelberg is a commonly used printing machine in China. When it encounters a failure that its own maintenance force cannot handle, it should ask outside maintenance personnel to perform equipment maintenance. At present, there are many maintenance companies or individual maintenance personnel engaged in Heidelberg offset presses, and their levels vary widely. Some maintenance personnel or maintenance companies often undertake equipment failure repairs that exceed their own capabilities. As a result, they not only did not solve the problems of the equipment, but also brought other problems with the equipment and caused hidden accidents. The following answers to common technical faults of Heidelberg.
Fault 1: The main motor carbon brush alarm symbol appears on the console of the Heidelberg CD102-4 offset press
The manufacturer's treatment method: directly replace the original carbon brush. The carbon brush is only used for about 2 days, and the carbon brush alarm symbol appears again. The inspection revealed that the carbon brushes had worn out.
Correct maintenance method: Before replacing the carbon brush, the surface of the motor copper head must be checked. If there is obvious wear, it must be strictly handled. The steps are as follows:
â‘ Disassemble the motor and disassemble the motor rotor.
â‘¡Process the worn parts on the copper head of the motor rotor on the lathe.
â‘¢Use a sharp tool to clean the grooves on the copper head, so that the mica material in it can not contact the carbon brush, so as to increase the service life of the carbon brush.
â‘£Assemble the motor, but do not install the carbon brush.
⑤ Drag with another motor to rotate the repaired motor, use fine sandpaper to polish the copper head of the motor until it reaches a higher finish requirement, and use an air compressor to remove the copper powder generated by polishing.
â‘¥ Install the carbon brush, and use fine sandpaper to polish the contact surface of the carbon brush and the copper head.
⑦ Use another motor to drive, and make the main motor rotate for more than 12 hours.
⑧ Install the main motor on the machine at a speed of 3000 rpm, and check if there is any obvious spark at the carbon brush. If the spark is obvious, the above steps should be repeated. If there is no spark, it can be turned on and used. The speed of the previous day or two should not exceed 8000 rpm, and check the wear of the carbon brush at any time. After everything is stable, it can run at normal speed.
Trouble 2: The delivery line breaks through the paper when it is in contact with the impression liner
The operator's approach: bend the delivery teeth.
Mistakes: After the delivery teeth are deformed, the size of the gripper paper becomes smaller, which can easily cause the “peeling†failure of the final unit and cause trouble for the adjustment of the delivery teeth row in the future.
Correct maintenance method: check the gap between the delivery pad and the impression cylinder and the opening and closing time of the cylinder row, and adjust it. If some of the parts on the delivery line are worn, they should be replaced in time.
Fault 3: Breaking fault of the plate ink roller swing frame
Due to improper operation of the Heidelberg HD102V offset printing machine, which was shipped in 1985, the two units were broken by the plate ink roller swing frame.
Treatment method: Because I don't know how to disassemble the small wallboard of the ink supply part of the machine, the two ends of the original ink inking roller are cut off, and the domestic ink inking roller is replaced.
Fault 4: Quality problems with the ink roller
The position of the 8mm hole on the shaft of the transmission surface of the replaced inking roller is too large to be installed, and the hole is enlarged. The pin is reconfigured, but there is still a positional deviation.
Error: The bearing at the position of the ink roller gear is damaged due to unreasonable force. The broken bearing ball falls into the gear, causing most of the water and ink parts to be damaged. The direct economic loss is more than 50,000 yuan.
Correct maintenance method: remove the small wall plate on the operation surface of the ink supply part, take out the ink roller in whole, and replace the ink roller swing frame.
Cartoon Aircraft Series,kids playground Aircraft Castle,Outdoor Cartoon Aircraft Castle,Cartoon Aircraft Playground Equipment
Zhejiang Egoal Playground Equipment Co., Ltd. , https://www.trampolineparks.pl